Contact of inking cylinder and impression cylinder on rotary presses



D; LLBOYD 2,173,875

CONTACT OF INKING CYLINDER AND IMPRESSION CYLINDER 0N ROTARY PRESSES Sept. 26, 1939.;

Original Filed June 28, 1938 5 Sheets-Sheet 1 t9AM .INVENTOR. BY g g a) ATTORNEY.

Sept. 26, 1939. I BOYD 2,173,875

CONTACT 0F INKING CYLINDER AND IMPRESSION CYLINDER ON ROTARY PRESSES Original Filed June 28, 1958 5 Sheets-Sheet 2 GEAR SH'JE N' g \l- FEEDER 5m:

Sept. 26, 1939. D. L. BOYD 2,173,375 I CONTACT OF INKING CYLINDER AND IMPRESSION CYLINDER ON ROTARY PRESSES Original Filed June 28, 1938 5 Sheets-Sheet 3 D; 1.. BOYD 2,173,875

CONTACT OF INKING CYLINDER AND IMPRESSION CYLINDER ON ROTARY PRESSES Sept. 26, 1939.

Original Filed June 2 8, 1938 5 SheetsSheet 4 Fnas D; 1.. BOYD Sept. 26, 1939.

CONTACT OF INKING CYLINDER AND IMPRESSION CYLI NDER ON ROTARY PRESSES 5 Sheets-Sheet 5 Original Filed June 28, 1958 FIG. 10

INVENTOR.

ATTORNEY.

Patented Sept. 26, 1939 PRESSION PRESSES CYLINDER ON ROTARY Donald L. Boyd, Huntington, W. Va., assignor to Carb-O-Spot Corporation, Athens, Ohio Original application June 28, 1938, Serial No.

216,192. Divided and this application Novembei- 30, 1938, Serial No. 243,088 g 4 Claims. (Cl. 101'247) My invention relates to that type of press as described in my copending application, Serial No. 216,192, filed June 28, 1938, of which this application is a division.

I It is well known that in presses of this character, it is necessaryto have a very minute adjustment between the impression cylinder and the printing or plate cylinder.

Itis also well'known that it is necessary to make frequent changes on the printing cylinder and this disturbs the adjustment made between the two cylinders.

My invention has for its object to provide a throw-off mechanism by. means of which the printing cylinder can be thrown out of contact with the impressioncylinder without in any way whatever effecting the adjustment between the rollers and their operative relationship.

My means of accomplishing the foregoing object may be more fully comprehended by having reference to the accompanying drawings, which are hereunto annexed and are a part of this specification in which:

Fig. 1 is a side elevation of my improved press from the gear side, with the oil pump, pipe and pipe connections left out for clarity;'

Fig. 2 is a rear view of the press, with oil pump, pipe and pipe connections left out for clarity;

Fig. 3 is a top plan view of the press showing digiggammatically the relationship of the various Fig. 4 is a fragmentary side view showing the driving gears, throw-oil arm and cam;

Fig. 5 is an enlarged fragmentary detail sectional view taken on line 55 of Fig. 4 showing the plate cylinder rackand pinion adjustment with locking device;

Fig. 6 is an enlarged fragmentary detail front elevation view showing the plate cylinder rack and pinion adjustment with locking device;

Fig. 7 is a transverse cross section of the ink fountain showing the relative position of the ink fountain roller, form roller and plate cylinder;

Figs. 8 and 9 are detail views inside and end elevations, respectively, from the feeder side of the press showing the printing plate application to the plate cylinder;

Figs. 10 and 11 are detail views showing the paper gripping positions of the elevatingfeed board, the gripper guides and grippers.

, Similar reference numerals refer to similar parts throughout the entire specification.

As shown in the drawings, I have illustrated the press which is described in my copending appllcation above referred to, but it will be obvious to persons skilled inthe art thatthe mechanism is not confined to any specific form of press, but may be used wherever it is desirable to' equip the press with the throw-off mechanism.

As illustrated in the drawings, the press comprises a frame consisting of two side frames l and 2 which carry the shafts on which are mounted the impression cylinder 3 and the plate cylinder 4, respectively. The impression cylinder 3 is arranged to be rotated clockwise, looking from the feeder side of the press, while the plate or printingcylinder 4 is rotated counter-clockwise. Any conventional means for driving the press may be employed. There are so many different ways which are well known in the art for this purpose that description is deemed unnecessary.

I provide means to adjust and regulate the. contact between the two cylinders 3 and l as follows,-the'shaft which carries the plate cylinder is mounted in journal boxes 5 which are SO slidably mounted in the upper ends 6 ofcam shaft levers I. The position of the boxes 5 and in turn the contact of the cylinders is adjusted by means of two screws 8 which are threaded into the ends of the cam shaft levers I so that the SI.

ends of the screws 8 will contact the journal boxes 5, the end of eachscrew abutting its respective box. v

These adjusting screws 8 are provided with suitable hand wheels! for convenient manipula- 80 tion. It will be clear from the. foregoing that when the hand wheels 9 are revolving, boxes 5 will be shifted correspondingly and by providing a fine thread on the screws 8, a very minute adjustment can be made. 35

The cam shaft levers I in which the boxes 5 are slidably and adiustably mounted, are arranged to swing upon pivot III as shown in Fig. 4. The lower ends of these levers I are actuated by. cams H mounted on a shaft l2 journalled in the 40 said frames I and 2. The shaft I2 is arranged to extend beyond one of the said frames and receives a foot treadle l3 by means of which the cams ll may be rotated to shift the position of the levers 1. This movement will operate to 45 throw off the contact between the plate or printing cylinder 4 and the impression cylinder 3.

It will be apparent from the foregoing description that once the desired adjustment between the rollers is made by means of the screws 8, the 50 throw-off mechanism can be operated time and time again without effecting the relative adjustment between the rollers in their operating relationship.

Having described my invention what I regard as new and desire to secure by letters Patent is: 1. In a rotary press, having a printing cylinder adapted to carry plates for printing, an impression cylinder adapted to contact the printing cylinder, a form roller which contacts said printing cylinder, an ink fountain, an ink fountain roller partially immersed therein in contact with said form roller; normally engaged gears connected to the impression and printing cylinders for driving the same, means to vary the position of the printing cylinder and thereby adjust the contact between the impression and printing cylinders, pivoted cam levers which carry said means, cams which engage said levers to throw the printing cylinder out of contact with respect to said impression cylinder and also move said printing cylinder with respect to said form roller without disturbing said contact adjusting means, and means to actuate said cams. go 2. In a rotary press, having a printing cylinder adapted to carry plates for printing, an impression cylinder adapted to contact the printing cylinder, a form roller which contacts said printing cylinder, an ink fountain, an ink foung5 tain roller partially immersed therein in contact with said form roller; means to vary the position of the printing cylinder and thereby adjust the contact between the impression and printing cylinders and pivotally mounted means rigidly an supporting said adjusting means to throw said printing cylinder out of contact with said impression cylinder and also move said printing cylinder with respect to said iorm roller without disturbing said adjusting means.

3. In a rotary press, having a printing cylinder adapted to carry plates for printing, an impression cylinder adapted to contact the printing cylinder, aform roller which contacts said printing cylinder, an ink fountain, an ink fountain roller 5 partially immersed therein in contact with said form roller; means to vary the position of the printing cylinder and thereby adjust the contact between the impression and printing cylinders,

pivotally mounted means supporting said adjust- 10.

ing means to throw said printing cylinder out of contact with said impression cylinder and also move said printing cylinder with respect to said form roller without disturbing said adjusting means means to actuate said throw-off means 15 and; positive driving means normally interconnecting said cylinders for synchronously driving the same. I

4. In a rotary press, having a printing cylinder adapted to carry plates for printing, an impression cylinder adapted to contact the printing cylinder, a form roller which contacts said printing cylinder, an ink fountain, an ink fountain roller partially immersed therein in contact with said form roller; means to adjust the contact between the impression and printing cylinders, pivotally mounted means rigidly supporting said printing cylinder to throw-oil? said printing cylinder with respect to said impression cylinder and also move said printing cylinder with respect to said form roller without disturbing said adjusting means, and means to actuate said throw-ofi means.

L. BOYD. 

